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protoc.go
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/
protoc.go
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package main
import (
"strings"
semver "github.com/Masterminds/semver/v3"
"github.com/magefile/mage/sh"
"github.com/pkg/errors"
)
const PROTOC_VERSION_CONSTRAINT = ">= 3.17.3"
func protocBinary() string {
return binaryWithExt("protoc")
}
func protocOutput(args ...string) (string, error) {
return sh.Output(protocBinary(), args...)
}
func protocRun(args ...string) error {
return sh.Run(protocBinary(), args...)
}
func protocVersion() (*semver.Version, error) {
output, err := protocOutput("--version")
if err != nil {
return nil, errors.Errorf("error running version cmd: %v", err)
}
fields := strings.Fields(string(output))
if len(fields) < 2 {
return nil, errors.Errorf("unexpected version cmd output: %s", output)
}
version, err := semver.NewVersion(fields[1])
if err != nil {
return nil, errors.Errorf("error parsing version: %v", err)
}
return version, nil
}
func protocCheck() error {
version, err := protocVersion()
if err != nil {
return errors.Errorf("error getting version: %v", err)
}
return constraintCheck(version, PROTOC_VERSION_CONSTRAINT, "protoc")
}